This is the 10978th most frequent Russian word.
выяснение
Clarification or elucidation.
The word 'выяснение' is used as a noun that refers to the process of investigation or clarification.
Процесс выяснения причин произошедшего был долгим.
The process of clarifying the reasons for what happened was lengthy.
Here, 'выяснение' means the process of specifying or elucidating details.
Выяснение деталей договора занимает больше времени.
Clarifying the details of the contract takes more time.
In this sentence, 'выяснение' denotes investigating or understanding of the situation.